Wednesday, August 31, 2011


1. What is a substance that used as a baking powder?

A. Sodium chloride
B. Sodium sulphate
C. Calcium carbonate
D. Sodium hydrogen carbonate. (/)

2. Which of the following statements is true about one mole of a substance?

A. 1 mole of magnesium contains 6 x 1023 molecules
B. 1 mole of carbon dioxide contains 6 x 1023 atoms
C. 1 mole of water contains the same number of molecules as the number of atoms in 12 g carbon-12. (/)
D. 1 mole of carbon monoxide contains the same number of atoms as the number of atoms in 12 g carbon-12.

3. Elements in Periodic Table are arranged according to the

A. Increasing of proton number (/)
B. Increasing of nucleon number
C. Increasing of the size of atoms
D. Increasing of number of electron

4. When metal in group 1 reacts with water, acidic solution and gas X produced. What is gas X?

A. Oxygen
B. Carbon dioxide
C. Chlorine
D. Hydrogen (/)

5. Covalent bond between atoms nitrogen and atoms hydrogen is formed when

A. Atom nitrogen receives electron from atom hydrogen
B. Atom hydrogen receives electron from atom nitrogen
C. Atom hydrogen donates electron to atom nitrogen
D. Both atoms share their valence electron (/)

6. Which of the following is a property of ionic compound

A. Need a lot of energy to break their bonds.(/)
B. Able to conduct electricity in solid state
C. Soluble in organic solvent
D. Easily to volatile

7. Which of the following statements correctly describe a strong acid?

I have a high pH value
II Ionizes completely in water
III Has a high concentration of hydrogen ions
IV reacts with alkali to produce salt and water

A. I and II
B. II and III (/)
C. I, II and III
D. I, II, III and IV

8. Which statement correct about noble gases

A. Exist as diatomic molecules
B. Do not formchemical bonds (/)
C. Form ions with different valencies
D. Combine with transition metals to form coloured compounds

9. What is the product of reaction when zinc is reacted with sodium carbonate?

I water
II hydrogen gas
III zinc carbonate
IV carbon dioxide gas

A. I and II
B. II and III
C. I, III and IV (/)
D. I, II, III and IV

10. A substance has the following properties:

• Hard and opaque
• Good insulator of heat and electricity
• Inert towards chemicals

Which of following substances has the above properties?

A. Ceramic (/)
B. Glass
C. Metal
D. Polymer

11. Which of the following statements is true about fat?

I Saturated fat can be converted to unsaturated fat by hydrogenation process.
II Fat form from the reaction between glycerol and fatty acid
III Palm oil is an example unsaturated fat
IV Fat is a natural ester

A. I, II and III
B. I, III and IV
C. II, III and IV (/)
D. I, II, III and IV

12. Which of the following is an oxidation process?

A. Propene changes into propane
B. Lead(II) oxide loses its oxygen
C. Magnesiumatomformsmagnesiumion. (/)
D. Chlorine molecule gains electrons.

13. Ali facing a lot of family problems and he is under depression. He cannot sleep normally for the last two weeks. Which of the following medicine could be suitable to treat him?

A. Codeine
B. Barbiturate (/)
C. Paracetamol
D. Streptomycin

14. Vinegar is used widely in fruit pickle industry. Which type of food additive is represented by vinegar?

A. Colouring agent
B. Thickener
C. Antioxidant
D. Preservative (/)

15. Which of the following characteristics shows that salt is suitable used as food preservative

A. Saltiness
B. Dehydrating property (/)
C. Easy to find
D. Toxicity

16. Dry hydrogen chloride gas is passed through methyl benzene for a few minutes. Which of the following statements is true about the liquid produced?

I it has a pH value of less than 7
II it consists of hydrogen chloride molecules
III it changes blue litmus to red
IV it does not conduct electric current

A. I and III only
B. II and IV only (/)
C. I, II and III only
D. I, II , III and IV

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